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Drug Alcohol Depend. 2013 Oct 1;132(3):646-53. doi: 10.1016/j.drugalcdep.2013.04.020. Epub 2013 May 25.

Computer and therapist based brief interventions among cannabis-using adolescents presenting to primary care: one year outcomes.

Author information

1
University of Michigan, Department of Psychiatry, Ann Arbor, MI, USA. Electronic address: waltonma@med.umich.edu.

Abstract

AIMS:

This paper describes outcomes from a randomized controlled trial examining the efficacy of brief interventions delivered by a computer (CBI) or therapist (TBI) among adolescents in urban primary care clinics.

METHODS:

Patients (ages 12-18) self-administered a computer survey. Adolescents reporting past year cannabis use completed a baseline survey and were randomized to control, CBI or TBI, with primary (cannabis use, cannabis related consequences - CC) and secondary outcomes [alcohol use, other drug use (illicit and non-medical prescription drugs), and driving under the influence of cannabis (DUI)] assessed at 3, 6, and 12 months.

RESULTS:

1416 adolescents were surveyed; 328 reported past year cannabis use and were randomized. Comparisons of the CBI relative to control showed that at 3 months the group by time interaction (G × T) was significant for other drug use and CC, but not for cannabis use, alcohol use, or DUI; at 6 months, the G × T interaction was significant for other drug use but not for cannabis use, alcohol use, or CC. For analyses comparing the TBI to control, at 3 months the G×T interaction was significant for DUI, but not significant for cannabis use, alcohol use, or CC; at 6 months, the G×T interaction was not significant for any variable. No significant intervention effects were observed at 12 months.

CONCLUSION:

Among adolescent cannabis users presenting to primary care, a CBI decreased cannabis related problems and other drug use and a TBI decreased cannabis DUI in the short-term. Additional boosters may be necessary to enhance these reductions over time.

TRIAL REGISTRATION:

ClinicalTrials.gov NCT01329315.

KEYWORDS:

Adolescent; Brief intervention; Cannabis; Computer; Primary care

PMID:
23711998
PMCID:
PMC3770780
DOI:
10.1016/j.drugalcdep.2013.04.020
[Indexed for MEDLINE]
Free PMC Article

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